Ozone history
| Year | Numbre of ozone days | Maps |
| 1998 | ozdays_1998.pdf | |
| 1999 | ozdays_1999.pdf | |
| 2000 | ozdays_2000.pdf | |
| 2001 | ozdays_2001.pdf | |
| 2002 | ozdays_2002.pdf | |
| 2003 | ozdays_2003.pdf | |
| 2004 | ozdays_2004.pdf | day by day
survey april/september |
| 2005 | ozdays_2005.pdf | |
| 2006 | ozdays_2006.pdf |
Long term evolutions 